noun
plural twins
[count] either one of two babies that are born at the same time to the same mother
either one of two similar things that form a pair
adjective
always used before a noun
used to describe children who are twins
made up of two similar things that are used together
forming one of a pair of related or connected ideas or places
verb
twins; twinned; twinning
[+ obj] to bring (two things) together in close association - usually used as (be) twinned
Brit :to form a relationship between (two towns in two countries) - usually used as (be) twinned